[Bug] Any support on RN 0.70 with TypeScript 3.8?

[vasteez]

Describe the bug
On this package version 0.8.0 (I am upgrading from 0.6.6 due to new RN) I get a bunch of typescript errors, probably due to my TS being 3.8.

Additional context
I get these kind of errors

node_modules/react-native-mmkv-storage/dist/src/hooks/useMMKV.d.ts:76:17 - error TS1005: ',' expected.

76         setValue: (value: T | ((prevValue: T) => T)) => void
                   ~

node_modules/react-native-mmkv-storage/dist/src/types/index.d.ts:50:48 - error TS1005: ',' expected.

50 export declare type GenericReturnType<T> = [key: string, value: T | null | undefined];
                                                  ~

node_modules/react-native-mmkv-storage/dist/src/types/index.d.ts:50:63 - error TS1005: ',' expected.

50 export declare type GenericReturnType<T> = [key: string, value: T | null | undefined];
                                                                 ~

Is a higher TS version a must or is there any patch for this?